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NIST Intercomparison Exercise Program for Organic Contaminants in the Marine Environment

Summary:

Since the beginning of the National Oceanic and Atmospheric Administration (NOAA) National Status and Trends (NS&T) Program in 1987, NIST has coordinated intercomparison exercises for the determination of organic contaminants in marine sediment and tissue as part of the NS&T quality assurance (QA) program.  National Research Council (NRC) of Canada has coordinated similar intercomparison exercises for trace elements. These intercomparison exercises have become an excellent tool for assessing the comparability of analytical measurements among the marine environmental measurement community. 

Description:

Until 2000, these intercomparison exercises were carried out with financial support from both NOAA and NIST. Beginning in 1993, laboratories not directly involved with NOAA programs (e.g., private laboratories) were allowed to participate in the exercises by paying a participation fee. Since 2000, NIST has required all laboratories participating in the organic exercises to pay the participation fee, which partially covers the costs of the program.

Additional Technical Details:

Click this link for a list of target analytes in the NIST Intercomparison Exercise Program for Organic Contaminants in the Marine Environment.

Descriptions of the 2007 Interlaboratory Comparison Materials:

Marine Sediment XIV QA07SED14 3 x 21.0 g (wet-mass basis) of a wet marine sediment (Each sample was prepared by adding a known mass of water to a known mass of marine sediment that was collected in a harbor area and has been freeze-dried, ground, sieved, and radiation-sterilized. This material is stored at -20 °C until shipped to participants on dry ice.)

Mussel Tissue XIII QA07TIS13 2 x 6 g (dry-mass basis) of a freeze-dried mussel tissue homogenate (The mussels were collected from an urban area. It was prepared as a cryogenically homogenized, fresh material and then freeze-dried in bulk. The freeze-dried material was sieved to remove the larger particles. This material is stored at room temperature.)

Major Accomplishments:

NISTIR 7501:  NIST Intercomparison Exercise Program for Organic Contaminants in the Marine Environment: Description and Results of 2007 Organic Intercomparison Exercises

NISTIR 7340:  NIST Intercomparison Exercise Program for Organic Contaminants in the Marine Environment: Description and Results of 2005 Organic Intercomparison Exercises

NISTIR 7792:  Interlaboratory Analytical Comparison Study to Support Deepwater Horizon Natural Resource Damage Assessment:  Description and Results for Marine Sediment QA10SED01

NISTIR 7793:  Interlaboratory Analytical Comparison Study to Support Deepwater Horizon Natural Resource Damage Assessment:  Description and Results for Crude Oil QA10OIL01

NISTIR 7819:  Interlaboratory Analytical Comparison Study to Support Deepwater Horizon Natural Resource Damage Assessment:  Description and Results for Mussel Tissue QA10TIS01

A photograph of two people performing mussel collection.

Start Date:

October 1, 1987

End Date:

Ongoing

Lead Organizational Unit:

mml

Staff:

Michele Schantz
phone 301-975-3106
fax 301-977-0685
e-mail: michele.schantz@nist.gov

If you are interested in the inorganic intercomparison exercise, please contact Scott Willie at the Institute for National Measurement Standards, National Research Council of Canada, Ottawa, Ontario, Canada K1A OR6; Telephone 1-613-993-4969; Fax 1-613-993-2451; e-mail scott.willie@nrc.ca.